A Novel Optimal Space Vector Modulation Technique of Current Source Inverter for Solar Power Integration

Abstract

The goal of the paper is to develop a novel modulation technique that combines merits of space vector modulation (SVM) scheme and synchronous optimal pulse-width modulation (SOPWM) technique for current source inverter (CSI). SVM provides better dynamic performance but unable to produce less total harmonic distortion (THD) on inverter current at low device switching frequency ($\lt 1$ kHz). SOPWM provides less THD even at low device switching frequency however it needs a conversion technique to operate CSI and it needs an additional control technique to improve dynamic performance. Hence to overcome these limitations, this paper develops a single modulation technique called optimal SVM technique that can achieve less THD as well as better dynamic performance. The proposed method do not require an additional conversion technique to operate CSI and it provides less THD even while operating under low device switching frequency of 450 Hz. Experimental results prove that the proposed modulation technique can provide better steady state performance as well as dynamic performance.